Search results
Results from the WOW.Com Content Network
In telecommunications, a plant test number is a telephone number reserved for use by telephone installers or other workers to test an individual telephone line. Test numbers are typically unlisted. The North American Numbering Plan (NANP) reserves the exchange (central office) prefixes 958 and 959 for plant testing. [1]
Some companies also reserve 999 for test exchanges. Numbers within these test exchange block ranges are used for various types of local and long-distance testing; generally, this block includes a ringback number (to test the ringer when installing telephone sets) and a loop around (which connects a call to another inbound call to the same or ...
By connecting a test telephone set, a technician calls the local telephone number of the automatic number announcement service. This call is connected to equipment at the central office that uses automatic equipment to announce the telephone number of the line calling in. The main purpose of this system is to allow telephone company technicians ...
If the number is active for test, the prefix listed (often 200, 990, 997, 998, 999) remains within a block currently marked by NANPA.com as unassignable [3] in the one specified area code. These test numbers will be shut down before the 'UA' flag is removed, the prefix made available [4] or reassigned as a standard exchange.
Get answers to your AOL Mail, login, Desktop Gold, AOL app, password and subscription questions. Find the support options to contact customer care by email, chat, or phone number.
For premium support please call: 800-290-4726 more ways to reach us
A typical lineman's handset integrates an earpiece, a mouthpiece, a dialing interface, and a set of test leads for connecting to the telephone circuit. Originally, lineman's handsets featured a rotary dial , but modern sets use some variant of the standard 12-button DTMF keypad and also employ an amplifier for speaker use.
When you buy a bottle of vitamins from a nutrition store, you’ll probably notice a best-by date on the bottom of the jar. But that inscribed number isn’t a hard-and-fast rule—there is some ...